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Chapter 35: Q101P (page 1080)
Find the slit separation of a double-slit arrangement that will produce interference fringesapart on a distant screen when the light has wavelength.
Thus, the wavelength of visible light is.
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In Fig. 35-45, a broad beam of light of wavelength 683 nm is sent directly downward through the top plate of a pair of glass plates. The plates are 120 mm long, touch at the left end, and are separated by at the right end. The air between the plates acts as a thin film. How many bright fringes will be seen by an observer looking down through the top plate?
A thin film suspended in air is 0.410 thick and is illuminated with white light incident perpendicularly on its surface. The index of refraction of the film is 1.50. At what wavelength will visible light that is reflected from the two surfaces of the film undergo fully constructive interference?
The speed of yellow Light (from a sodium lamp) in a certain liquid is measured to be . What is the index of refraction of this liquid for the Light?
Figure 35-25 shows two sources s1 and s2 that emit radio waves of wavelengthin all directions. The sources are exactly in phase and are separated by a distance equal to 1.5 . The vertical broken line is the perpendicular bisector of the distance between the sources.
(a) If we start at the indicated start point and travel along path 1, does the interference produce a maximum all along the path, a minimum all along the path, or alternating maxima and minima? Repeat for
(b) path 2 (along an axis through the sources) and
(c) path 3 (along a perpendicular to that axis).
Figure 35-56a show two light rays that are initially in phase as they travel upward through a block of plastic, with wavelength 400 nm as measured in air. Light ray exits directly into air. However, before light ray exits into air, it travels through a liquid in a hollow cylinder within the plastic. Initially the height of the liquid is 40.0 , but then the liquid begins to evaporate. Let be the phase difference between raysand once they both exit into the air. Figure 35-56b, shows versus the liquid鈥檚 height until the liquid disappears, with given in terms of wavelength and the horizontal scale set by.What are (a) the index of refraction of the plastic and (b) the index of refraction of the liquid?
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